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It is the recipient domain is valid? You may verify at <a href="http://www.mxtoolbox.com/" rel="ugc">www.mxtoolbox.com/</a>
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It is the recipient domain is valid? You may verify at www.mxtoolbox.com/ [http://www.mxtoolbox.com/]

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The recipient domain is valid
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Can you send to the recipient through any other mail server?: (E.g., via a MAIL.COM account.)<br />
<br />
Tom
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Can you send to the recipient through any other mail server?: (E.g., via a MAIL.COM account.)

Tom

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This is using MS Exchange 2007 server. Whenever I tried to send a mail to abc.com, the mail failed. I can see that the mail is stuck in the Exchange Queue. From Queue viewer, I found this mail with following status:<br />
<br />
&nbsp; &nbsp;450 4.5.0 No recipient succeeded<br />
<br />
All other domains are ok. Why? How to troubleshoot?<br />
<br />
Thanks in advance!
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This is using MS Exchange 2007 server. Whenever I tried to send a mail to abc.com, the mail failed. I can see that the mail is stuck in the Exchange Queue. From Queue viewer, I found this mail with following status:

   450 4.5.0 No recipient succeeded

All other domains are ok. Why? How to troubleshoot?

Thanks in advance!

Why got 4.5.0 no recipient succeeded for mail sending

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.